作者:Ferenc Miklós、Iván Kanizsai、Pál Sohár、Géza Stájer
DOI:10.1016/s0022-2860(02)00007-8
日期:2002.6
acids, the tri-, tetra- and pentacyclic pyrazolo[3,4-d]pyrimidines 2–6 were prepared. The acetylhydrazide 1a reacted with levulinic acid to yield a pyrazoloazepinone 7, together with the pyrrolopyrazolopyrimidinone 8, by acylation of the primary amine following intramolecular cyclization involving either the pyrazole carbon or the hydrazide imino group. After separation, the structures of the new compounds
摘要 通过 5-氨基-1-苯基-4-吡唑碳酰肼 1 与芳酰基烷烃羧酸和(双)环烷烃羧酸的反应,三、四和五环吡唑并 [3,4-d] 嘧啶 2-6 是准备好了。乙酰基酰肼 1a 与乙酰丙酸反应生成吡唑并氮杂酮 7,以及吡咯并吡唑并嘧啶酮 8,通过在涉及吡唑碳或酰肼亚氨基的分子内环化后将伯胺酰化。分离后,新化合物的结构通过核磁共振测量确定。